According to the series given below, fill in the blank with a suitable letter that would satisfy the series.Z, B, D, F, H, ____

Let's examine the positional values of the letters starting from B:B = 2D = 4F = 6H = 8The sequence increases by $+2$ for each step:$2+2=4$ (D)$4+2=6$ (F)$6+2=8$ (H)$8+2=10$ (J)(Note: Z acts as the starting reference point or 0 index in a cyclic alphabet system).The next letter in the series is J.